Cutting Text best practices

What are the best practices for designing and outputting text to a vinyl cutter?

I am new to CorelDraw.  Should text be converted to curves or contours prior to cutting?  If so, what is the technical reason behind that?

In my case, I have been designing in CorelDraw using basic fonts and outputting to a roland printer/plotter.  the only way I achieve success is by first converting the text to curves.  Why?